Wholesale

Tangless Insert (No-Tang Wire Thread Insert)

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Product Overview

The tangless insert removes the break-off tang used on standard coil inserts, replacing it with a notched top coil that is engaged and released by a matching installation tool in a single operation. Because there is no tang to snap off and no loose tang to retrieve afterward, this insert is specified in assemblies where foreign object debris (FOD) cannot be tolerated.

We supply tangless inserts to aerospace, defense and precision machinery buyers who require full material traceability, together with the matching installation and removal tools used to seat and, if needed, extract the insert.

Specifications

Item Detail
Material A286, Inconel X-750, 300 series stainless steel
Standard NASM21209 (tangless, free running and screw lock)
Thread Size Range Metric M2 – M20; Unified #2-56 – 3/4"-10
Design Feature Notched top coil for tool engagement, no break-off tang
Length Options 1D, 1.5D, 2D, 2.5D, 3D
Surface Finish Passivated, silver plate, or phosphate & oil
Operating Temperature Up to 650°C (1200°F) for A286 / Inconel X-750 grades
Documentation Material certificate, C of C, and inspection report available on request

Application Fields

  • ✓Aerospace engine and airframe assemblies
  • ✓Turbine housings and hot-section components
  • ✓Satellite and defense electronics enclosures
  • ✓Precision instrument and optical housings
  • ✓Hydraulic and fuel system components
  • ✓Blind-hole or confined-access assemblies where FOD control is critical

Key Advantages

  • No tang break-off step, which removes the FOD risk created by a loose tang fragment after installation.
  • Combined installation and removal tool seats the insert in a single pass, cutting installation time versus tang-style parts.
  • Suited to blind holes and confined-access locations where retrieving a broken tang would be difficult or impossible.
  • High-temperature alloy options (A286, Inconel X-750) extend service life in hot-section and exhaust-adjacent assemblies.
  • Consistent, repeatable removal force reduces the risk of damaging the surrounding parent material during rework.

Payment & Shipping

Payment Terms

  • T/T, L/C and Trade Assurance accepted for production orders
  • 30% deposit, balance against shipping documents
  • Sample sets available prepaid by PayPal or courier freight-collect

Shipping & Packaging

  • Stock alloy/size: 10–15 days; special alloy or certification paperwork: 20–35 days
  • Air freight recommended for aerospace project deadlines; sea freight for larger bulk orders
  • Anti-corrosion packaging with desiccant for long-distance or long-term storage shipments
  • Installation and removal tools can be shipped together with the insert order

Small qualification-batch orders are accepted for buyers who need to complete first-article inspection before releasing a full production purchase order.

Frequently Asked Questions

  • Q: What is the actual difference between a tangless insert and a standard tang-style insert?
  • A: A tangless insert has a notched top coil that a special tool grips directly, so there is no tang to break off or retrieve after installation, unlike a standard tang-style insert.
  • Q: Do you supply the installation and removal tool needed for this insert type?
  • A: Yes, the matching installation tool and, where required, the removal tool are available together with the insert order.
  • Q: Can you provide AS9100 or material certification for aerospace projects?
  • A: Yes, material certificates, certificates of conformance and inspection reports can be provided to support incoming inspection and traceability requirements.
  • Q: Are these inserts available in high-temperature alloys such as Inconel or A286?
  • A: Yes, both Inconel X-750 and A286 are offered for elevated-temperature applications, in addition to standard 300 series stainless steel.
  • Q: Can tangless inserts be used in blind holes?
  • A: Yes, the absence of a tang makes this insert well suited to blind-hole applications where a broken-off tang could not otherwise be removed.
Company Profile
Dongtai Jinzhize Metal Products Co., Ltd.
Dongtai Jinzhize Metal Products Co., Ltd.
As Tangless Insert (No-Tang Wire Thread Insert) Manufacturer and Tangless Insert (No-Tang Wire Thread Insert) Factory, Dongtai Jinzhize Metal Products Co., Ltd. is a specialized manufacturing facility dedicated to threaded connection products for the automotive and aerospace sectors. We primarily produce Helical Wire Inserts, Self-Tapping Inserts, Key Locking Inserts, Threaded Adapters, Oil Plugs, as well as matching installation taps and tools. Established in 2015, the company operates from a 10,000-square-meter-owned manufacturing plant equipped with hundreds of machine tools and automated production systems. Through years of development, we have built an experienced team of design, development, and production specialists, complemented by a rigorous quality management system and comprehensive after-sales service mechanism. Our products are widely utilized in the automotive industry (including engines and transmissions for both passenger and commercial vehicles), the aerospace industry, and rail vehicle manufacturing. With an annual output value of 153 million RMB in 2024, we possess the capability for a large-scale, stable supply. We are committed to providing customers with highly consistent, traceable products and reliable service support.

Related Products

HISTORY
Evelopment Path
2015
The company was established, identifying threaded connection metal products as its core focus. It concentrated on the R&D and production of thread inserts and supporting tools, laid out related products, deeply cultivated the automotive and aviation fields, and built an initial production and product framework.

2016
Started the construction of its own factory, introduced machine tools and equipment, set up an initial team, completed small-batch trial production of core products, expanded nearby customers, and achieved initial breakthroughs in production capacity.

2017
Optimized product processes, conducted special R&D on products adapted for the automotive field, increased equipment investment, standardized procedures and established quality inspection processes, improved product qualification rates, and accumulated experience in supporting automotive components.

2018
Obtained ISO 9001 quality management system certification, improved the full-process quality control mechanism, enhanced product consistency and reliability, strengthened competitiveness, and expanded high-quality customer resources.

2019
Expanded the factory, added automated equipment to increase production capacity; set up R&D and production teams, promoted the R&D of non-standard customized products, optimized after-sales processes, and built an initial after-sales system.

2020
Expanded the core automotive industry market, initiated cooperation in the aviation and rail vehicle fields; optimized supply chain management to respond to raw material fluctuations and ensure stable production.

2021
Introduced digital production management tools to promote the upgrading of production automation; deepened cooperation with leading automotive component enterprises, optimized product structure and enriched product specifications.

2022
Put a 10,000-square-meter factory into use, equipped with hundreds of automated equipment to achieve large-scale production; optimized the full industrial chain process, improved after-sales services, and provided customized solutions.

2023
Developed thread inserts adapted for new energy vehicles, promoted the precision upgrading of products to meet aviation scenario requirements; initiated the construction of a quality traceability system and increased production capacity and market share.

2024
The output value reached 153 million yuan, with an annual production of 100 million automotive engine thread inserts and 50 million oil plugs; products were widely used in multiple fields, forming a traceable supply system and becoming a high-quality supplier in the segment.

2025
Promoted high-end system certification in the automotive and aviation fields; deepened digital transformation, improved production efficiency, shortened delivery cycles, and strengthened collaborative supply capacity.

2026
Developed special alloy thread inserts and expanded high-end segmented markets; improved green manufacturing, expanded overseas markets, promoted brand upgrading, and transformed into an integrated solution provider.

Corporate Highlights
Documenting the daily life and growth of Jinzhize—from production sites and quality inspections to training sessions and exhibition communications.
Every photo bears witness to our professionalism and collaboration.
  • Dongtai Jinzhize Metal Products Co., Ltd.
  • Dongtai Jinzhize Metal Products Co., Ltd.
  • Dongtai Jinzhize Metal Products Co., Ltd.
  • Dongtai Jinzhize Metal Products Co., Ltd.

Equipment & Tooling

We are equipped with comprehensive production facilities covering forming, machining, wire cutting, grinding, cleaning, assembly, and packaging. We enhance processing consistency through the management of tooling fixtures, cutting tools, and process parameters. Capable of quickly organizing process integration and production scheduling based on diverse product and order requirements, we ensure a stable production rhythm and reliable delivery.

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